import 'package:enjoy_plus/utils/http.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:geolocator/geolocator.dart';
import 'package:permission_handler/permission_handler.dart';

import '../../../utils/toast.dart';

class LocationList extends StatefulWidget {
  const LocationList({super.key});

  @override
  State<LocationList> createState() => _LocationListState();
}

class _LocationListState extends State<LocationList> {
  Future<void> requestLocationPermission() async {
    PermissionStatus status = await Permission.location.request();
    if (status.isGranted) {
      // 权限未授予
      ToastUtil.showSuccess('位置权限授予');
    } else {
      // 权限未授予
      ToastUtil.showError('位置权限未授予, 请去设置中心开启');
    }
  }

  /**
   * 异步获取当前设备的位置信息。
   *
   * 此方法首先根据设备的平台（Android、iOS/macOS 或 Web）配置不同的定位设置，
   * 然后使用这些设置获取设备的当前位置，并处理位置信息或异常。
   */
  Future<void> getCurrentLocation() async {
    late LocationSettings locationSettings;

    if (defaultTargetPlatform == TargetPlatform.android) {
      // 针对Android平台，设置高精度定位、100米距离过滤、强制使用位置管理器等
      locationSettings = AndroidSettings(
          accuracy: LocationAccuracy.high,
          distanceFilter: 100,
          forceLocationManager: true,
          intervalDuration: const Duration(seconds: 10),
          foregroundNotificationConfig: const ForegroundNotificationConfig(
            notificationText:
                "Example app will continue to receive your location even when you aren't using it",
            notificationTitle: "Running in Background",
            enableWakeLock: true,
          ));
    } else if (defaultTargetPlatform == TargetPlatform.iOS ||
        defaultTargetPlatform == TargetPlatform.macOS) {
      // 针对iOS和macOS平台，设置高精度定位、健身活动类型、100米距离过滤等
      locationSettings = AppleSettings(
        accuracy: LocationAccuracy.high,
        activityType: ActivityType.fitness,
        distanceFilter: 100,
        pauseLocationUpdatesAutomatically: true,
        // 只有在应用在后台启动时才设置为true
        showBackgroundLocationIndicator: false,
      );
    } else if (kIsWeb) {
      // 针对Web环境，设置高精度定位、100米距离过滤、5分钟的最大年龄等
      locationSettings = WebSettings(
        accuracy: LocationAccuracy.high,
        distanceFilter: 100,
        maximumAge: const Duration(minutes: 5),
      );
    } else {
      // 对于其他平台，默认设置高精度定位和100米距离过滤
      locationSettings = const LocationSettings(
        accuracy: LocationAccuracy.high,
        distanceFilter: 100,
      );
    }
    try {
      // 使用配置好的定位设置获取当前位置
      Position position = await Geolocator.getCurrentPosition(
          locationSettings: locationSettings);
      // 显示成功获取到的纬度和经度
      ToastUtil.showSuccess('${position.longitude}, ${position.latitude}');
      print('${position.longitude}, ${position.latitude}');
      reverseGeocoding(position.longitude, position.latitude);
    } catch (e) {
      // 处理可能出现的异常
      print(e.toString());
    }
  }

  String address = '';

  // 逆地理编码
  Future<void> reverseGeocoding(double longitude, double latitude) async {
    try {
      final response = await http
          .get('https://restapi.amap.com/v3/geocode/regeo?parameters', params: {
        'key': 'fdb39b413378c3d281b2feea51a48722',
        'location': '$longitude,$latitude',
        'radius': 500,
        'type': '住宅小区'
      });
      setState(() {
        address = response['regeocode']['formatted_address'];
      });
    } catch (e) {
      ToastUtil.showError('获取定位失败');
    }
  }

  // 获取附近小区
  List nearbyCommunities = [];

  Future<void> getNearbyCommunities(double longitude, double latitude) async {
    try {
      final response = await http
          .get('https://restapi.amap.com/v3/place/around?parameters ', params: {
        'key': 'fdb39b413378c3d281b2feea51a48722',
        'location': '$longitude,$latitude',
        'keywords': '住宅小区',
        'radius': 500,
      });
      nearbyCommunities = [];
      for (var element in (response['pois'] as List)) {
        // print(element['name']);
        setState(() {
          nearbyCommunities.add(element);
        });
      }
    } catch (e) {
      ToastUtil.showError('获取附近小区失败');
    }
  }

  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    requestLocationPermission();
    getCurrentLocation();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('选择社区'),
      ),
      body: ListView(
        padding: const EdgeInsets.all(10),
        children: [
          const Row(
            children: [
              Text(
                '当前地址',
                style: TextStyle(color: Colors.grey),
              )
            ],
          ),
          const SizedBox(height: 10),
          Container(
            color: Colors.white,
            padding: const EdgeInsets.all(10),
            child: Row(
              children: [
                Expanded(child: Text(address)),
                GestureDetector(
                  onTap: () {
                    reverseGeocoding(116.345652, 40.058701);
                    ToastUtil.showSuccess('手动设置成功，已重新定位');
                    getNearbyCommunities(116.345652, 40.058701);
                  },
                  child: const Row(
                    children: [
                      Icon(Icons.location_searching_outlined,
                          color: Colors.blue),
                      SizedBox(width: 2),
                      Text(
                        '重新定位',
                        style: TextStyle(color: Colors.blue),
                      ),
                    ],
                  ),
                )
              ],
            ),
          ),
          const SizedBox(height: 10),
          const Row(
            children: [
              Text(
                '附近社区',
                style: TextStyle(color: Colors.grey),
              )
            ],
          ),
          const SizedBox(height: 10),
          ListView(
              shrinkWrap: true,
              physics: const NeverScrollableScrollPhysics(),
              children: nearbyCommunities
                  .map(
                    (item) => GestureDetector(
                      onTap: () {
                        Navigator.pushNamed(context, '/building_list',
                            arguments: {'point': item['name']});
                      },
                      child: Container(
                        color: Colors.white,
                        padding: const EdgeInsets.all(10),
                        child: Row(children: [
                          Expanded(child: Text('${item['name']}')),
                          const Row(children: [
                            Icon(Icons.arrow_forward_ios,
                                size: 16, color: Colors.black),
                          ])
                        ]),
                      ),
                    ),
                  )
                  .toList()),
        ],
      ),
    );
  }
}
